Using 4 tubes, this 1924 receiver combines new technologies as an intermediate frequency stage that was already beginning to appear. Listening is via phone and battery power.
This circuit was found in a 90's Electronic Design. It takes advantage of the nonlinearity...
This sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is...
This sensitive MW receiver was found in a publication of year 1958., The circuit uses germanium...